Address some markdownlint findings.

docs/Content-Filters.md

@@ -18,7 +18,7 @@ syntax is used.
 > complex filters. It is suggested to test filters using ``Feed debugger`` (hotkey `f-D`) if you
 > feel that some filter is somehow misfiring on a specific feed.
 
-### Load order
+## Load order
 
 Filters are loaded in user-specified order and applied sequentially. It is
 possible to reorder filters using drag and drop. If no manual sorting is
@@ -26,7 +26,7 @@ specified, filters are sorted alphabetically according to user configured
 caption. If no caption is specified for any filter, loading order is not
 guaranteed.
 
-### Filter objects
+## Filter objects
 
 Each filter object may contain an arbitrary amount of regular expression rules
 and actions. Each expression may have inverse flag set, which inverts matching
@@ -41,7 +41,7 @@ as, title, content, author, etc.
 {: .warning }
 > Do not include delimiters (e.g. <code>/</code>) when writing regular expressions.
 
-### Matching articles and applying actions
+## Matching articles and applying actions
 
 Filter matching is performed during feed processing.
 

docs/Scoring.md

@@ -4,7 +4,7 @@ title: Scoring
 parent: Features
 ---
 
-Scoring is supported in a way similar to some newsreaders. Score is calculated
+Scoring is supported in a way similar to some news readers. Score is calculated
 on article import using special filters with a "Modify score" action.
 
 Resulting score is a sum of all score modifiers from all matching filters. For
@@ -15,16 +15,16 @@ Article score affects the position of the article in the headline buffer (which
 is sorted by score) and alters the way article is displayed:
 
 | Score | Display / Action |
-|-------|------------------|
+| --- | --- |
 | `<-500` | Score indicator points down, article is automatically marked as read |
 | `<-100` | Score indicator points down |
-| `<0`    | Score indicator points down, 1.5.0: article is excluded from Fresh feed and (as of 1.5.10 also excluded from email digest) |
-|   `0`   | Display normally |
-| `>0`    | Score indicator points up |
-| `>500`  | Score indicator points up |
+| `<0` | Score indicator points down, 1.5.0: article is excluded from Fresh feed and (as of 1.5.10 also excluded from email digest) |
+| `0` | Display normally |
+| `>0` | Score indicator points up |
+| `>500` | Score indicator points up |
 | `>1000` | Same as above, article is also marked as starred |
 
-### Adjusting manually
+## Adjusting manually
 
 Calculated score for an individual article may be adjusted by clicking on score
 indicator in the headlines list:

docs/Sorting.md

@@ -4,8 +4,10 @@ title: Sorting
 parent: Features
 ---
 
+## Sort Options
+
 Tiny Tiny RSS provides four options for how articles appear within a
-selected feed: `Default`, `Newest`, `Oldest`, `Title`.
+selected feed: `Default`, `Newest first`, `Oldest first`, `Title`.
 
 {: .note }
 > Special feeds (e.g. *Starred articles*) have unique sorting when *Default* is selected, otherwise they behave as described below.
@@ -22,11 +24,11 @@ This is the default (surprise!) and is recommended.
 2. Descending date/time the article was added into the Tiny Tiny RSS database.
 3. Descending date/time the feed's site states the article was published or changed.
 
-### Newest
+### Newest first
 
 1. Descending date/time the feed's site states the article was published or changed.
 
-### Oldest
+### Oldest first
 
 1. Ascending date/time the feed's site states the article was published or changed.
 

docs/Themes.md

@@ -8,7 +8,7 @@ Install by copying theme CSS (and any other content, if needed) into ``themes.lo
 
 **Please note that we’re not responsible for third party themes. Use at your own risk.**
 
-### FeedMei Theme + Plugins for Tiny Tiny RSS
+## FeedMei Theme + Plugins for Tiny Tiny RSS
 
 <img src="https://codeberg.org/ltguillaume/feedmei/media/branch/main/SCREENSHOT.png" alt="">
 <img src="https://codeberg.org/ltguillaume/feedmei/media/branch/main/SCREENSHOT2.png" alt="">
@@ -17,7 +17,7 @@ A clean and minimal theme for Tiny Tiny RSS, loosely inspired by Feedly. Built b
 
 **Codeberg** <https://codeberg.org/ltguillaume/feedmei>
 
-### Clean GReader Theme
+## Clean GReader Theme
 
 <img src="https://raw.github.com/naeramarth7/clean-greader/master/img/preview.png" alt="" style="width: 200px;"/>
 
@@ -26,7 +26,7 @@ Google Reader it has a white/greyish look.
 
 **Github** <https://github.com/naeramarth7/clean-greader>
 
-### Feedly Theme
+## Feedly Theme
 
 <img src="https://raw.github.com/levito/tt-rss-feedly-theme/master/feedly-screenshots/feedly-expandable.png" alt="" style="width: 200px;"/>
 
@@ -34,7 +34,7 @@ A theme built from scratch, independent of default css. Emulates the greyish loo
 
 **Github** <https://github.com/levito/tt-rss-feedly-theme>
 
-### Reeder Theme
+## Reeder Theme
 
 <img src="https://github.com/tschinz/tt-rss_reeder_theme/blob/master/reeder_screenshot/combined_mode_1.png?raw=true" alt="" style="width: 200px;"/>